Two solution of 90% and 97% purity and mixed resulting in 21 liters of mixture of 94% purity. How much is the quantity of the first solution in the resulting mixture?

Two solution of 90% and 97% purity and mixed resulting in 21 liters of

1.	Two solution of 90% and 97% purity and mixed resulting in 21 liters of mixture of 94% purity. How much is the quantity of the first solution in the resulting mixture?
A.	15 litres
B.	12 litres
C.	9 litres
D.	6 litres
Answer» D. 6 litres

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Two solution of 90% and 97% purity and mixed resulting in 21 liters of mixture of 94% purity. How much is the quantity of the first solution in the resulting mixture?

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